发明名称 |
Surface-emitting laser element including dielectric film selectively provided to control reflectance in emission region, surface-emitting laser array, optical scanner device, and image forming apparatus |
摘要 |
A disclosed surface-emitting laser element includes a substrate, multiple semiconductor layers stacked on the substrate including a resonator structure including an active layer, a semiconductor multilayer mirror on the resonator structure, and a confined structure where a current passage region is enclosed by at least an oxide generated by oxidation of part of a selective oxidation layer containing aluminum, an electrode provided around an emission region, and a dielectric film provided in a peripheral portion within the emission region and outside a central portion of the emission region to make a reflectance of the peripheral portion lower than that of the central portion. The dielectric film is arranged such that a reflectance of a high-order transverse mode in a second direction is higher than that in a first direction, and a width of the current passage region in the first direction is greater than that in the second direction. |
申请公布号 |
US8441511(B2) |
申请公布日期 |
2013.05.14 |
申请号 |
US20100910262 |
申请日期 |
2010.10.22 |
申请人 |
HARASAKA KAZUHIRO;SATO SHUNICHI;JIKUTANI NAOTO;SUGAWARA SATORU;RICOH COMPANY, LTD. |
发明人 |
HARASAKA KAZUHIRO;SATO SHUNICHI;JIKUTANI NAOTO;SUGAWARA SATORU |
分类号 |
B41J2/45;H01S5/00 |
主分类号 |
B41J2/45 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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